What is the current water temperature in Holyhead?

Q: What is the current water temperature in Holyhead?

As of now, in Holyhead, the water temperature is 15.01°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Holyhead

Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

59.0

°F

October 10, 19:32

Trend:

decreasing

Yesterday:

59.2°F

Tomorrow:

58.9°F

Sunrise:

07:35

Sunset:

18:35

Day Length:

11 h. 0 min.

Holyhead in October

Minimum:

47.8°F

Average:

48.8°F

Maximum:

50.2°F

Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 59.0°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.4°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 60.0°F on 2023, while the historical minimum was 57.7°F on 2015.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 58.7°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Holyhead

Date	Current Year actual* / forecast**	last year	10 years average
Sep 26	60.4°F	59.6°F	60.0°F
Sep 27	60.5°F	59.4°F	60.0°F
Sep 28	60.2°F	59.1°F	59.8°F
Sep 29	60.1°F	58.9°F	59.6°F
Sep 30	60.0°F	58.9°F	59.6°F
Oct 1	59.9°F	58.9°F	59.6°F
Oct 2	59.8°F	58.5°F	59.6°F
Oct 3	59.6°F	58.7°F	59.5°F
Oct 4	59.8°F	58.5°F	59.4°F
Oct 5	59.5°F	58.4°F	59.2°F
Oct 6	59.4°F	58.3°F	59.1°F
Oct 7	59.5°F	58.1°F	58.9°F
Oct 8	59.3°F	58.2°F	58.9°F
Oct 9	59.2°F	58.3°F	58.7°F
Oct 10	59.0°F	58.1°F	58.6°F
Oct 11	58.9°F	57.5°F	58.4°F
Oct 12	58.8°F	57.5°F	58.4°F
Oct 13	58.7°F	57.4°F	58.2°F
Oct 14	58.7°F	57.4°F	58.2°F
Oct 15	58.7°F	57.2°F	58.2°F
Oct 16	58.6°F	57.1°F	58.2°F
Oct 17	58.5°F	56.9°F	58.0°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Holyhead was recorded on August 29, 2025, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.6°F in Winter, 48.5°F in Spring, 58.0°F in Summer, and 57.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Caernarfon	58.1°F	19mi
Bangor	58.0°F	21mi
Conwy	58.1°F	33mi
Douglas	58.1°F	59mi
Aberystwyth	58.2°F	66mi

* current water temperature in this city

** straight line distance from Holyhead